The people outside the No. 3 Research Institute are all in charge of chores, and the main researchers are all inside. Except for the researchers, no one is allowed to enter.

Now the people in this outer courtyard are still sewing the airbags of the hot air balloon. Everyone's handwork is very careful, for fear that it will be torn apart by force.

"Ta Tata..."

A cloth lady and an old carpenter are following Niu Si out. These two are the main research leaders of the hot air balloon, one is responsible for the manufacture of the air bag of the hot air balloon, and the other is responsible for the manufacture of the bellows and the gondola of the hot air balloon. .

"See Lord City Lord." The cloth weaver and the old carpenter saluted respectfully.

"How is the hot air balloon test?" Liu Feng glanced at the two of them. The cloth weaver was one of the best weavers in Xiyang City, and the old carpenter's craftsmanship was among the top few in Xiyang City.

"Lord City Lord, we haven't tried it yet." The old carpenter said cowardly, he didn't dare to try it, he couldn't believe that they could make something from the heavens.

"What's the progress?" Liu Feng frowned and glanced at the person who was sewing the airbag. According to his estimation, it should be almost completed these days.

"Lord City Lord, it's done." The cloth-weaving woman said quickly, she was also a little uneasy. The airbag being sewn was preparing for the second test, for fear that something might go wrong the first time.

In fact, both the old carpenter and the weaving woman are illiterate. Now they are learning while manufacturing. Many capable people in the scientific research department do this, and then teach them to the next generation. In a few years, Liu Feng will reap the rewards. Mostly literate technicians.

"Let's go, take me to see." Liu Feng calmly said, it seems that he still needs to participate in it and give these people a little courage.

Otherwise, the real air fortress will not be built in the future. The hot air balloon is just a little trouble. As long as he has the means to mass-produce hydrogen, the airship will be built by him. That is the real air fortress. A few hundred miles is no problem, and he will hold the air dominance in his hands.

"Yes." The two said respectfully, and immediately led the way to the backyard of the No. 3 Research Institute.

"Master, can people really go to heaven?" En Li's brown eyes were suspicious, she was very suspicious of the possibility of going to heaven.

"Yes." Frey said suddenly indifferently.

"Uh..." Mother Hu Er was stunned for a moment, then rolled her eyes and said, "Yes, the bird clan orcs can go to the sky."

"Wait a minute, can't you see it with your own eyes?" Liu Feng said with a chuckle, no matter what era and world, people long for the sky, longing to fly to the blue sky, this is the dream of many people, he also did this when he was a child. dream.

"Okay." Hu Erniang's brown eyes were full of longing. The same goes for Mina and Eliza. Flying into the blue sky and white clouds was something they had fantasized about when they were young.

Soon, the group came to the empty space in the backyard, and they saw a delicate bamboo hanging blue, as well as airbags spread on the ground, as well as some charcoal, a wooden box and a few ceramic jars.

"Lord City Lord, things are ready." The old carpenter said respectfully, if Liu Feng didn't come, they would try it out two days later.

"According to the method I gave, get ready to start." Liu Feng said with a serious face, he didn't know whether it would be successful or not. After all, it was the first test, no one could tell.

"Yes." The old carpenter took a deep breath and immediately called someone to help assemble the hot air balloon.

The hot air balloon is composed of three parts: a balloon, a hanging basket and a heating device. The most important thing is the heating device, and Liu Feng used a bellows instead, which is the kind of hand-push wood bellows.

The rope on the airbag is tied to the gondola, then the bellows is installed, the charcoal is loaded into the gondola, and several jars of high alcohol are also loaded.

Then install a shelf above the hanging basket, put charcoal and pour alcohol. After ignition, start blowing with a bellows to spray the hot air into the airbag, and the hot air is continuously blown into the hot air balloon.

A few minutes later, Liu Feng and others saw that the airbag of the hot air balloon inflated, and gradually began to float upwards.

"No, no, young master, are you going to use this cloth bag to make people fly into the sky?" En Li's brown eyes widened in disbelief.

"Yes, this is called a hot air balloon." Liu Feng chuckled. He turned his head to look at Frei, and saw the girl staring at the hot air balloon without blinking. The blue veins could be seen on the hand holding his clothes. Violent.

"Floating, really floating." The old carpenter shouted happily, just like a child.

The hot air balloon floated completely. If it wasn't tied by a big rock, I'm afraid it would have already flown into the sky. This scene made the cloth woman cry.

The old carpenter and the weaving woman were under a lot of pressure. After all, they had never touched this thing before, for fear that the city owner would be dissatisfied with what they made.

Or, this is most of the thinking of the scientific research department. Liu Feng's invisible pressure is too great. After all, good treatment is to see results, and simple people always feel that they have to pay back after eating.

"Lord Liu Feng, I want to go up." Frei turned her head and looked straight at Liu Feng, her green eyes full of desire.

"Okay." Liu Feng nodded. He glanced at Mina, Anli, and Eliza. They all saw desire in each other's eyes, and said softly, "Come one by one, don't worry."

This hot air balloon is small, and it can carry the weight of two people, no more.

"Master, let me come first." Cat Erniang stood up and said, she was afraid of the danger of the hot air balloon.

"No, it won't fly very high." Liu Feng waved his hand and took Frei's hand towards the hot air balloon.

The first test flight would definitely not fly very high, and the scientific research department was not very far from Xiyang City. He didn't want the news of the hot air balloon to be exposed, which would definitely attract some forces to snoop.

It's better to be low-key, and for the time being, it's better to be low-key.

Chapter 0406 Frey's request.

"Lord Liu Feng, hurry up." Frei dragged Liu Feng's hand towards the hot air balloon. She wanted to go up to the blue sky to see it.

"Okay." Liu Feng reluctantly followed, but there was a smile on the corner of his mouth. The girl has obvious mood swings now, which is a good thing. Perhaps, this can be a breakthrough to understand Frei's past.

Liu Feng came to the hanging basket, stepped into the hanging basket, turned around and wanted to reach out to hug the girl in, but saw the girl holding the hanging basket with one hand, turning over sensitively into the hanging basket, he remembered that the girl was regarded as a killer. cultivated.

"That's alright." Frei looked up at Liu Feng who stretched out his hands, a smile flashed in his indifferent eyes.

"Okay." Liu Feng sighed, the elusive girl, he turned his head and shouted to the old carpenter standing beside him, "Let go of the rope."

"Yes." The old carpenter said respectfully, and quickly untied one of the ropes tied to the big stone.

"Stand firm." Liu Feng urged, he pushed the bellows, the flames rose up at once, and the hot air balloon slowly rose.

When they saw the hot air balloon swaying off the ground, everyone was breathing rapidly, Mina's body was even more tense, and her blue eyes stared at Liu Feng worriedly, for fear that it would suddenly fall.

"Mina, Mina..." An Li grabbed Cat Erniang's arm with her little hand, and shouted nervously and excitedly, "Master, Master is really going to heaven."

"Yes, yes." Mina replied dryly, she was very nervous, and she was praying that nothing would happen.

"Too...it's unbelievable." Eliza covered her mouth with one hand, her emerald green eyes twinkled with brilliance, and stared at the hot air balloon that continued to rise. The scene in front of her gave her a great impact.

She never imagined that, in addition to the bird race orcs, there is actually such a way to make people fly into the blue sky. The image of Liu Feng at this moment is infinitely high in Eliza's heart, and it becomes more and more mysterious, as if it is covered with fog. Makes you want to explore.

"That's great, it's a success." The old carpenter choked, wiping away tears with his arms, staring at the still-rising hot air balloon.

"Quick, get the sackcloth ready, hurry up." Niu Shi roared, instructing to spread the sackcloth underneath, in case it fell and could pick up people.

He was nervous. If something happened to the young master, I was afraid that he would be torn apart by his parents and brothers, not to mention the people of Xiyang City. I was afraid that the entire scientific research department would be flattened.

The people on the ground were nervous, but the people on the hot air balloon were very happy. Liu Feng pushed the bellows from time to time. Now it has risen to more than 100 meters high. Because there is a rope tied to the big rock, it will no longer rise. Gao was about to fly out of the valley.

"call……"

Liu Feng let out a breath of hot air. It was really cold up there. He turned his head and saw Frey staring blankly into the distance, looking very obsessed.

"What's wrong? Do you miss the feeling of flying before?" Liu Feng's black eyes flashed with pity, and he reached out and touched the girl's head.

For Frey, who used to be able to fly freely in the sky, it is a sad thing that she can only rely on hot air balloons to touch the sky now.

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